Either the compression is changing the circles a bit, or they do in fact move - I’ve held a piece of paper covering all but a slight edge of a circle (obscuring

Either the compression is changing the circles a bit, or they do in fact move - I’ve held a piece of paper covering all but a slight edge of a circle (obscuring everything else) and I can see the edge expanding/moving ever so slightly. Still not enough to call BS on the illusion, but it might actually help “augment” it a bit.